{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-197qocb8","versions":[{"created_at":"2026-06-13T20:00:34Z","element_count":84,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"ba152e856cd4dbba1d2165fb8c2ad9c2e80f6f27cd9733e70883f958d1f0f07e","version":3},{"created_at":"2026-06-13T19:49:08Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2445382549093b52f006c44959f3ace7af0203ea4172054b84b3c3c923939d04","version":2},{"created_at":"2026-06-13T19:49:06Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}